The Gear,spur, cataloged under National Stock Number 3020-00-021-5462, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-021-5462 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 3.564 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 3.820 INCHES FIRST END IN |
| Teeth Quantity | 57 |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 4.000 INCHES FIRST END IN |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.375 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 8 |
| Hardness Rating | 80.0 ROCKWELL A MINIMUM AND 83.0 ROCKWELL A MAXIMUM OVERALL |
| Nominal Overall Length | 0.870 INCHES IN |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | AMS6290 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 4.7500 INCHES NOMINAL IN |
| Tooth Form | STUB |
| Hub Style Designator | PLAIN FIRST END |
| Spline Quantity | 70 BOTH ENDS |
| Nominal Outside Diameter | 4.917 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Counterbore Nominal Depth | 0.310 INCHES FIRST END IN |
| Spline Pitch Diameter | 3.5000 INCHES NOMINAL FIRST END IN |
| Face Nominal Width | 0.500 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 665474 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-021-5462 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-390-1875. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-021-5462: Bore Nominal Diameter: 3.564 INCHES BOTH ENDS IN; Hub Nominal Diameter: 3.820 INCHES FIRST END IN; Teeth Quantity: 57; Body Style: PLAIN, SOLID. 22 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.